CN119036127A

CN119036127A - Zero point positioning tray based on multi-sensor integration

Info

Publication number: CN119036127A
Application number: CN202411382952.4A
Authority: CN
Inventors: 高鹏捷; 明伟伟; 马铮; 王海航
Original assignee: Shanghai Jiao Tong University
Current assignee: Shanghai Jiao Tong University
Priority date: 2024-09-30
Filing date: 2024-09-30
Publication date: 2024-11-29

Abstract

The present invention discloses a zero-point positioning pallet based on multi-sensor integration, comprising a base plate, a pallet body arranged above the base plate, a fixture fixedly installed on the top of the pallet body, a chuck symmetrically installed inside the base plate, a socket arranged inside the chuck, a strain sensor symmetrically arranged on the top of the chuck, and a rivet corresponding to the socket arranged at the bottom of the pallet body, one end of the rivet extending into the socket. The present invention can replace the disassembly and assembly of the original fixture by the disassembly and assembly between the chuck and the rivet according to different workpiece processing when replacement is required, and the repeated positioning accuracy is higher than that of the original fixture. The workpiece can always be kept in the same position of the machine tool coordinate system, and there is no need to re-calibrate the tool, and no secondary clamping error will be generated. The workpiece processing accuracy is improved, and ensuring the accuracy of the replacement process is also the basis for realizing other functions, reducing downtime, increasing equipment utilization, and facilitating the improvement of the replacement automation rate.

Description

Zero point positioning tray based on multi-sensor integration

Technical Field

The invention relates to the technical field of trays, in particular to a zero point positioning tray based on multi-sensor integration.

Background

The zero point positioning system is used as a flexible clamp and gradually applied to the fields of automobiles, aerospace and the like in China, compared with the traditional clamping and positioning scheme, the zero point positioning system has the advantages of remarkable positioning precision and mounting replacement efficiency, continuous energization is realized in the aspects of improving the automation rate of a production line, simplifying process arrangement, reducing the design cost of the tool and the flexibility of the production line, and the zero point positioning tray is used for supporting the clamp in the zero point positioning system.

After the traditional clamp clamps the workpiece, the workpiece is machined through the machine tool, but when the workpiece with different sizes is clamped, the corresponding workpiece is clamped by replacing different clamps, and when the workpiece is clamped by replacing the clamps, a secondary clamping error can be generated, so that the machining precision is not ideal.

Disclosure of Invention

The invention aims to provide a zero point positioning tray based on multi-sensor integration, which aims to solve the technical problem of reducing clamping workpiece errors in the background technology.

In order to achieve the purpose, the zero point positioning tray based on multi-sensor integration comprises a substrate, wherein a tray body is arranged above the substrate, clamps are fixedly arranged at the top of the tray body, chucks are symmetrically arranged in the substrate, jacks are arranged in the chucks, strain sensors are symmetrically arranged at the top of the chucks, blind nails corresponding to the jacks are arranged at the bottom of the tray body, one end of each blind nail extends to the inside of each jack, a movable cavity is arranged in each chuck, a limiting assembly is arranged in each movable cavity, and reset disc springs are fixedly arranged in the chucks.

Preferably, a thread cylinder is arranged in the tray body, a threaded rod is connected with the thread cylinder in a threaded manner, and one end of the threaded rod is fixedly connected with the blind rivet.

Preferably, a positioning surface is arranged on the blind rivet.

Preferably, the limiting assembly comprises a steel ball and a driving plate, the driving plate is arranged in the movable cavity, the steel ball is arranged at a position corresponding to the driving plate, and one end of the reset disc spring is fixedly connected with the driving plate.

Preferably, the chuck array is provided with a cylinder corresponding to the driving plate, a piston block is arranged in the cylinder, and one end of the piston block is fixedly connected with the driving plate.

Preferably, the substrate is provided with a force sensor, the tray body is fixedly provided with a laser displacement sensor, the tray body is fixedly provided with an acceleration sensor, the acceleration sensor is positioned on one side of the laser displacement sensor, the tray body is fixedly provided with a visual sensor, and the visual sensor is positioned on one side of the clamp.

Compared with the prior art, the invention has the beneficial effects that:

1. According to the invention, through the installed tray body, according to different workpiece processing, the disassembly and assembly between the chuck and the blind rivet are required to replace the disassembly and assembly of the original clamp, the repeated positioning precision is higher than that of the original clamp and is far higher than the process requirement, so that the workpiece can be always kept at the same position of a machine tool coordinate system regardless of disassembly and assembly, the tool is not required to be re-aligned, the secondary clamping error is not generated, the workpiece processing precision is improved, the precision of the replacement process is ensured to be the basis for realizing other functions, the downtime is reduced, the equipment utilization rate is increased, the replacement automation rate is conveniently improved, the processing path arrangement is more flexible, the tool type and the tool related cost are reduced, the process is more flexible, the production line is easy to schedule, and the mixed line production is possible.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a zero point positioning tray based on multi-sensor integration;

FIG. 2 is a schematic view of a tray body according to the present invention;

FIG. 3 is a schematic drawing of the blind rivet structure of the present invention;

FIG. 4 is a schematic view of a substrate structure according to the present invention;

fig. 5 is a schematic view of a chuck according to the present invention.

The device comprises a base plate, a tray body, a clamp, a threaded cylinder, a threaded rod, a blind rivet, a7, a locating surface, a 8, a chuck, a9, an inserting hole, a 10, a strain sensor, a 11, a movable cavity, a 12, a steel ball, a 13, a driving plate, a 14, a reset disc spring, a 15, a cylinder, a 16, a piston block, a 17, a force sensor, a 18, a laser displacement sensor, a 19, an acceleration sensor, a 20 and a visual sensor.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "configured to," "connected," and the like are to be construed broadly as, for example, "connected" may be a fixed connection, may be a removable connection, or an integral connection, may be a mechanical connection or an electrical connection, may be a direct connection or may be an indirect connection via an intermediary, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-5, an embodiment of the present invention is provided: the utility model provides a zero point location tray based on multisensor integration, including base plate 1, base plate 1 top is provided with tray body 2, tray body 2 top fixed mounting has anchor clamps 3, inside symmetrical chuck 8 of installing of base plate 1, chuck 8 inside is provided with jack 9, chuck 8 top symmetry is provided with strain sensor 10, tray body 2 bottom is provided with the blind rivet 6 that corresponds with jack 9, blind rivet 6 one end extends to jack 9 inside, chuck 8 inside is provided with movable chamber 11, movable chamber 11 inside is provided with spacing subassembly, chuck 8 inside fixed mounting has reset disc spring 14, use the zero point location tray based on multisensor integration carries out the centre gripping to the work piece that is processed through anchor clamps 3, after fixing base plate 1 on the lathe, insert blind rivet 6 inside jack 9, through hydraulic oil can drive spacing subassembly motion, and then spacing subassembly can spacing blind rivet 6 position, according to different work piece processing, let the dismouting of the dismouting between chuck 8 and the blind rivet 6 be replaced anchor clamps 3 when changing, the time frame is required, the repetition positioning accuracy is higher than former anchor clamps, and be higher than former anchor clamps, moreover, be far higher than the requirement is not only can be changed the time frame again in order to change the time is required, the time is realized at the same time, the time of changing the time is not changing the work piece, the precision is realized, the precision is reduced, the precision is increased and is more than the precision is realized, the precision is reduced, the precision is increased, the precision is realized, the precision is more than the precision is required to change and is more than the time is realized, and is more than the time to change and is more than and is required, the machine tool to change and is more than the time to change and the precision is more than and the time to be changed, the precision, the processing path arrangement is more flexible, can once realize five-sided processing, reduces frock kind and frock related cost, and the process is more flexible, and the production line dispatch is easy, can mix line production, after tray body 2 installs on base plate 1, through strain sensor 10, can infer the processing situation from the strain signal, can even further predict blind rivet 6's remaining life and maintain in advance.

Referring to fig. 2 and 3, a threaded cylinder 4 is disposed inside the tray body 2, a threaded rod 5 is screwed inside the threaded cylinder 4, one end of the threaded rod 5 is fixedly connected with a blind rivet 6, and the blind rivet 6 is fixedly mounted on the tray body 2 through cooperation of the threaded rod 5 and the threaded cylinder 4.

Referring to fig. 3, the blind rivet 6 is provided with a positioning surface 7. The positioning surface 7 is provided with an annular groove, so that the position of the blind rivet 6 can be conveniently positioned.

Referring to fig. 5, the limiting assembly includes a steel ball 12 and a driving plate 13, the driving plate 13 is disposed in the movable cavity 11, the steel ball 12 is disposed at a position corresponding to the driving plate 13, one end of a reset disc spring 14 is fixedly connected with the driving plate 13, a cylinder 15 corresponding to the driving plate 13 is disposed in an array of chucks 8, a piston block 16 is disposed in the cylinder 15, one end of the piston block 16 is fixedly connected with the driving plate 13, a conveying pipeline is disposed in the substrate 1, one end of the conveying pipeline extends out of the substrate 1, the other end of the conveying pipeline is connected with one end of the cylinder 15, after the blind rivet 6 is inserted into the jack 9, a pressure medium, i.e., gas or hydraulic oil, enters the cylinder 15 through the conveying pipeline, and then pushes the piston block 16 to move, when the piston block 16 moves, the driving plate 13 pushes the steel ball 12 to move, one side of the steel ball 12 moves into an annular groove on the positioning surface 7, and further limits the position of the blind rivet 6, so that the tray body 2 is fixedly mounted on the substrate 1.

Referring to fig. 1 and 4, a force sensor 17 is disposed on a substrate 1, a laser displacement sensor 18 is fixedly mounted on a tray body 2, an acceleration sensor 19 is fixedly mounted on the tray body 2, the acceleration sensor 19 is located at one side of the laser displacement sensor 18, a vision sensor 20 is fixedly mounted on the tray body 2, the vision sensor 20 is located at one side of a fixture 3, high-precision zero point positioning and processing state monitoring of parts are realized through a multi-sensor data fusion technology and a multi-mode feature analysis method, the positioning center of the parts is always consistent with the processing center of processing equipment, meanwhile, based on a multi-sensor signal analysis result, the processing state is monitored in real time, processing abnormality is accurately predicted in time, equipment downtime is reduced, and the processing efficiency of the parts is improved.

The working principle is that when the zero positioning tray based on multi-sensor integration is used for processing a workpiece, the workpiece to be processed is clamped through the clamp 3, after the substrate 1 is fixed on a machine tool, the blind rivet 6 is inserted into the jack 9, pressure medium, namely gas or hydraulic oil, enters the cylinder 15 through a conveying pipeline, and then the piston block 16 is pushed to move, the driving plate 13 is pushed to move when the piston block 16 moves, the driving plate 13 can push the steel ball 12 to move, one side of the steel ball 12 moves to enter into the annular groove on the positioning surface 7, and then the position of the blind rivet 6 is limited, so that the tray body 2 is fixedly installed on the substrate 1, and then a limiting component can limit the position of the blind rivet 6, the disassembly and assembly between the chuck 8 and the blind rivet 6 are replaced according to different workpieces to be processed, the repeated positioning precision is higher than that of the original clamp, and is far higher than the process requirement, so that the workpieces can be always kept at the same position of a machine tool coordinate system, the tool is not required to be re-aligned, namely, the two-dimensional coordinate system is kept, the two-dimensional coordinate system is also can be kept, the zero position of the workpiece system is obviously kept, the zero position of the tooling is greatly reduced, the two-dimensional line is more flexible, the process precision is improved, the number of the two-dimensional line is more flexible, the process precision is realized, the process is more flexible, the process precision is realized, and the production precision is more flexible, and the process precision is more is convenient, and the process steps are more flexible, and the process steps are realized, and the process steps are more can be more easily, and the process steps are more are realized.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A zero point positioning tray based on multi-sensor integration comprises a substrate (1) and is characterized in that a tray body (2) is arranged above the substrate (1), a clamp (3) is fixedly arranged at the top of the tray body (2), a chuck (8) is symmetrically arranged inside the substrate (1), a jack (9) is arranged inside the chuck (8), strain sensors (10) are symmetrically arranged at the top of the chuck (8), blind nails (6) corresponding to the jack (9) are arranged at the bottom of the tray body (2), one end of each blind nail (6) extends into the jack (9), a movable cavity (11) is formed inside the chuck (8), a limiting component is arranged inside the movable cavity (11), and a reset disc spring (14) is fixedly arranged inside the chuck (8).

2. The zero-point positioning tray based on the multi-sensor integration according to claim 1, wherein a threaded cylinder (4) is arranged inside the tray body (2), a threaded rod (5) is connected inside the threaded cylinder (4) in a threaded mode, and one end of the threaded rod (5) is fixedly connected with a blind rivet (6).

3. The zero-point positioning tray based on multi-sensor integration according to claim 2, wherein the blind rivet (6) is provided with a positioning surface (7).

4. The zero-point positioning tray based on multi-sensor integration according to claim 1, wherein the limiting component comprises a steel ball (12) and a driving plate (13), the driving plate (13) is arranged in the movable cavity (11), the steel ball (12) is arranged at a position corresponding to the driving plate (13), and one end of a reset disc spring (14) is fixedly connected with the driving plate (13).

5. A zero-point positioning tray based on multi-sensor integration according to claim 4, wherein the chuck (8) is provided with a cylinder (15) corresponding to the driving plate (13) in an array, a piston block (16) is arranged in the cylinder (15), and one end of the piston block (16) is fixedly connected with the driving plate (13).

6. The zero-point positioning tray based on multi-sensor integration according to claim 5, wherein the substrate (1) is provided with a force sensor (17), the tray body (2) is fixedly provided with a laser displacement sensor (18), the tray body (2) is fixedly provided with an acceleration sensor (19), the acceleration sensor (19) is positioned on one side of the laser displacement sensor (18), the tray body (2) is fixedly provided with a vision sensor (20), and the vision sensor (20) is positioned on one side of the clamp (3).